Whether you’re a senior in high school or a senior-living resident, you’ve likely heard of Viagra (sildenafil) — the original ...

While Lemonaid says that its pharmacies stock branded Viagra, its website goes into much more detail about the 20-mg sildenafil pills that provide many of the same benefits as Viagra for a lower cost.

Revatio and Viagra contain the same active ingredient called sildenafil. However, Revatio is used for pulmonary arterial hypertension (PAH), whereas Viagra is used for erectile dysfunction (ED).